port opening

I can't open a port in the Sharing/System Pref Pane on my G4 iBook (10.4.7). I can click on Edit... on existing ports, but am unable to create a new one. I was trying to open up 5052 for DropCopy. The button activates when I click on it, but nothing happens.

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.